.top_icon {
    width: 0.67rem;
    height: 0.67rem;
}
.back-to-top {
    position: fixed;
    bottom: 15%;
    right: 7%;
    z-index: 2;
    cursor: pointer;
}
.back-to-top i {
    width: 1.5rem;
    height: 1.5rem;
    line-height: 1.15rem;
    font-style:normal;
    display: inline-block;
    position: relative;
    text-align: center;
    padding: 0.13rem;
    border: 1px solid #f7f7f7;
    background-color: #fff;
    border-radius: 50%;
    transition: all 0.3s linear;
    color: #919191 !important;
}
.tips {
    display: inline-block;
    position: absolute;
    word-break: normal;
    white-space: nowrap;
    width: auto;
    font-size: 0.32rem;
    color: red;
    z-index: -1;
}
.left {
    right: 0;
    top: 50%;
    margin-right: 50px;
    transform: translateY(-50%);
}
.right {
    left: 0;
    top: 50%;
    margin-left: 50px;
    transform: translateY(-50%);
}
.bottom {
    bottom: 0;
    margin-top: 50px;
}
.top {
    top: 0;
    margin-bottom: 50px;
}